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Posted to issues@impala.apache.org by "Tamas Mate (Jira)" <ji...@apache.org> on 2021/02/09 08:45:00 UTC

[jira] [Created] (IMPALA-10492) Lower default MAX_CNF_EXPRS query option

Tamas Mate created IMPALA-10492:
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             Summary: Lower default MAX_CNF_EXPRS query option
                 Key: IMPALA-10492
                 URL: https://issues.apache.org/jira/browse/IMPALA-10492
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend, Frontend
    Affects Versions: Impala 4.0
            Reporter: Tamas Mate


Currently MAX_CNF_EXPRS is set to unlimited by default, with complex queries the CNF rewrite can lead to significant frontend memory usage and eventually OutOfMemory. A potential default value could be in the range of 1000.

cc.: [~amansinha], [~drorke]



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